I just can't seem to keep from just staying a mite confused!
I have read all I can find (and what's a boatload of stuff) about fans for supercharged (S/C'd) 80s. Concerns about cooling and clearance dominate the discussion. Concerns about fans getting into the radiator core are also widespread.
I selected the "3.0 Dan-Fan" based on the excellent research done by CDan some time ago. Also suggested was trimming the bottom of the shroud to give just a bit more clearance for the fan blades... if I'm measuring correctly, the arc of the spinning fan blades actually drops under the bottom of the radiator core (therefore, the need for 'trimming' the shroud).
Now, here's where I get perplexed: The lower flange (where the bottom tank joins the core) of the radiator (early or late radiator doesn't matter... 'tis all the same), sits proud of the core by a half-inch or so. This leaves only a similar half-inch of clearance between the "Dan-Fan" and the radiator lower flange.
So, wouldn't any fan flex (or whatever disaster could happen) cause the fan blades to strike the lower flange well before they would hit the core? If this is the case, it would seem to make sense that any radiator core damage from "blade strike" would be more like colleteral damage from the carnage - and flying sharp bits) caused by the blades hitting the lower flange.
Does any of this make sense?
I have read all I can find (and what's a boatload of stuff) about fans for supercharged (S/C'd) 80s. Concerns about cooling and clearance dominate the discussion. Concerns about fans getting into the radiator core are also widespread.
I selected the "3.0 Dan-Fan" based on the excellent research done by CDan some time ago. Also suggested was trimming the bottom of the shroud to give just a bit more clearance for the fan blades... if I'm measuring correctly, the arc of the spinning fan blades actually drops under the bottom of the radiator core (therefore, the need for 'trimming' the shroud).
Now, here's where I get perplexed: The lower flange (where the bottom tank joins the core) of the radiator (early or late radiator doesn't matter... 'tis all the same), sits proud of the core by a half-inch or so. This leaves only a similar half-inch of clearance between the "Dan-Fan" and the radiator lower flange.
So, wouldn't any fan flex (or whatever disaster could happen) cause the fan blades to strike the lower flange well before they would hit the core? If this is the case, it would seem to make sense that any radiator core damage from "blade strike" would be more like colleteral damage from the carnage - and flying sharp bits) caused by the blades hitting the lower flange.
Does any of this make sense?